What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 54100-3: Monocyclohexyl methylphosphonate (U) [Mass/Vol]

Name: LOINC Code 54100-3: Monocyclohexyl methylphosphonate (U) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.582Z

54100-3 is a LOINC code used to identify Monocyclohexyl methylphosphonate (U) [Mass/Vol] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Monocyclohexyl methylphosphonate. It is commonly used with the system or sample type Urine.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Monocyclohexyl methylphosphonate. It is commonly used with the system or sample type Urine.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Both

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Monocyclohexyl methylphosphonate [Mass/volume] in Urine
Monocyclohexyl methylphosphonate
Cyclosarin metabolite; DRUG/TOXICOLOGY; Drugs; Level; Mass concentration; MeP; Methyl phosphonate; Methyl phosphonic acid; Methylphosphonic acid; Monocyclohexyl Me-phosphonate; MP; MPA; MPn; Point in time; QNT; Quan; Quant; Quantitative; Random; UA; UR; Urn

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Monocyclohexyl methylphosphonate (U) [Mass/Vol]Monocyclohexyl methylphosphonate [Mass/volume] in UrineMonocyclohexyl Me-phosphonate Ur-mCncMonocyclohexyl methylphosphonateDRUG/TOXMonocyclohexyl methylphosphonate, UrineMCnc

Frequently asked questions

Code details

Code54100-3

SystemLOINC

Display nameMonocyclohexyl methylphosphonate (U) [Mass/Vol]

DescriptionMonocyclohexyl methylphosphonate

Short nameMonocyclohexyl Me-phosphonate Ur-mCnc

ComponentMonocyclohexyl methylphosphonate

PropertyMCnc

TimingPt

System (specimen)Urine

ScaleQn

ClassDRUG/TOX

Example unitspg/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.26

Last changed2.56

Consumer names

Monocyclohexyl methylphosphonate, Urine

Part names

Monocyclohexyl methylphosphonateMCncPtUrineQnMass ConcentrationPoint in time (spot)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.